function [start, stop] = start_stop_dialog()   

prompt={'Enter the start time:','Enter the stop time:'};
   def={'0','200'};
   dlgTitle='Start Stop Times';
   lineNo=[1 30];
   answer=inputdlg(prompt,dlgTitle,lineNo,def);
   start=str2num(char(answer(1)));
   stop=str2num(char(answer(2)));